/*
 * Copyright (c) 2010-2011, NVIDIA Corporation
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 *     derived from this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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#pragma once

#include <voxelpipe/base.h>
#include <thrust/device_vector.h>

namespace voxelpipe {

///
/// Compact_ranges class
///
struct Compact_ranges
{
    Compact_ranges(const uint32 n);

    /// given two arrays {b[0], b[1], ..., b[n-1]} and
    /// {e[0], e[1], ..., e[n-1]} specifying a set of n
    /// possibly empty ranges { [b(i),e(i)) : i = 0,...,n-1 },
    /// return a copy of the two arrays with all the empty
    /// ranges removed, and an array specifying their position
    /// in the original list.
    ///
    /// \param dest_begin  output range start indices
    /// \param dest_end    output range end indices
    /// \param dest_id     output range index in the original list
    /// \param src_begin   input range start indices
    /// \param src_end     input range end indices
    /// \param n           number of input elements
    /// \result            number of output elements
    ///
    uint32 run(
        int32* dest_begin, int32* dest_end, int32* dest_id,
        const int32* src_begin,
        const int32* src_end,
        const uint32 n);

private:
    thrust::device_vector<uint32> m_counters;
    thrust::device_vector<uint32> m_offsets;
};

} // namespace llpv